
Run REGEDIT.EXE
Navigate to HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Applets, and create a new key: "Defrag" (without quotes).
Now, within this newly created key, create the key: "Settings" (without quotes).
In the Settings key, create a string value and label it: "DisableScreenSaver" (without quotes).
Next, edit the value "(Default)" and change it to: "YES" (without quotes).
The next time DEFRAG is run, screen savers will be disabled.